—It’s years you broke up then.
—Yes. I have regretted the decision. It was long I realized I had mistaken him.
A. until; after
B. when; before
C. since; before
D. when; until
网友回答
A. until; after
B. when; before
(答案→)C. since; before
D. when; until
解析：本题考查固定句型。句义：自从我们分手以来已经好多年了。是的。我后悔那个决定。过了很久我才到我误会他了。固定句型：It is + 时间段 +since … did…, 自从。。。以来已经。。。。It was+ 时间点 +when … did…,当…的时候时间是……. It was+ 时间段 +before … did…,过了多久才,根据题干It 后的be 动词的时态，确定C正确。